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Finding the Fourth Proportional to 55,408.59, 83,112.90 and 13,855.59

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Solution

The fourth proportional to 55,408.59, 83,112.90 and 13,855.59 is: 20,783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,408.59 : 83,112.90 = 13,855.59 : x
  2. Step 2: Convert to fraction form
    55,408.59/83,112.90 = 13,855.59/x
  3. Step 3: Cross multiply
    55,408.59x = 83,112.90 × 13,855.59
  4. Step 4: Simplify right side
    55,408.59x = 1,151,578,266.11
  5. Step 5: Solve for x
    x = 1,151,578,266.11/55,408.59
  6. Step 6: Final answer
    x = 20,783.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.